METHOD AND DEVICE FOR ESTIMATING CONCENTRATION OF SULFURIC ACID

PROBLEM TO BE SOLVED: To provide a method and device for estimating the concentration of sulfuric acid suitable for grasping the concentration of sulfuric acid in the installation environment of concrete or mortar. SOLUTION: Concrete or mortar is immersed in sulfuric acid with predetermined concentration to keep a correlation between the product of the concentration and immersion period of sulfuric acid and the erosion depth of concrete or mortar by sulfuric acid preliminarily grasped (step S1). The concrete or mortar grasped in the correlation is installed in environment to be estimated only for a predetermined period (step S2) to measure the erosion depth by sulfuric acid of this environment (step S3), so that the concentration of sulfuric acid of the environment to be estimated is estimated on the basis of the erosion depth, the predetermined period and the correlation (step S4). COPYRIGHT: (C)2011,JPO&INPIT